The part number **W2XR-0V2V2-R2** belongs to the **W2XR Series** of high-precision current-sensing resistors manufactured by **Susumu**. These components are specifically designed for power management and current detection in automotive and industrial electronics. --- ### 1. Technical Specifications Table The following table breaks down the core technical parameters based on the Susumu naming convention: | Feature | Specification | Description | | :--- | :--- | :--- | | **Type** | Wide Terminal | Terminal is on the long side for better heat dissipation | | **Resistance Value** | 2 mΩ (0.002 Ω) | Indicated by "0V2V2" (2.2mΩ variant) | | **Tolerance** | ±1% | Precision rating for accurate measurement | | **Power Rating** | 2W - 3W | High power handling capability | | **Temperature Coeff.** | ±50 ~ ±100 ppm/°C | Stability over temperature changes | | **Package Size** | 1632 / 3264 | Standardized metric or imperial footprints | --- ### 2. Key Design Features * **Wide Terminal Structure:** Unlike standard chip resistors, the electrical contacts are located on the long sides. This reduces internal inductance and significantly improves heat dissipation into the PCB (Printed Circuit Board). * **Metal Foil Construction:** These resistors use a metal foil element which provides superior reliability and lower noise compared to thick-film alternatives. * **Low Inductance:** The geometry makes them ideal for high-frequency switching applications where parasitic inductance must be minimized. * **AEC-Q200 Compliant:** Most parts in this series are automotive-grade, meaning they can withstand harsh vibrations and high thermal cycling. --- ### 3. Common Applications 1. **Automotive Electronics:** Engine Control Units (ECUs), Battery Management Systems (BMS), and DC-DC converters. 2. **Power Supplies:** Current detection in high-efficiency switching power supplies. 3. **Industrial Motors:** Monitoring load currents in motor drivers and robotic arms. 4. **Consumer Tech:** High-power battery charging circuits in laptops and power tools. --- ### 4. Part Number Breakdown (Logic) ```text W2XR - 0V2V2 - R2 | | | | | +-- Packaging (e.g., Tape & Reel) | +--------- Resistance Value (0V2V2 = 2.2 mOhms) +----------------- Series Code (Wide terminal, high power) ```